mole of hydrocarbon contains 8g of hydrogen. lf the relative molecular mass is 92,the hydrogen is what?
Well, it seems like that mole of hydrocarbon had too much fun and ended up weighing just 8g! We always knew those moles were lightweights. As for the hydrogen, since one mole of hydrocarbon contains 8g of hydrogen, it must have taken a break and left its 1g of responsibility behind. Oops!
To find the number of moles of hydrogen in a hydrocarbon given the mass of hydrogen and the relative molecular mass, you can follow these steps:
1. Find the number of moles of the hydrocarbon using its mass and relative molecular mass. The formula to calculate the number of moles is:
Moles = Mass / Relative Molecular Mass
In this case, the mass is not given, so we cannot find the number of moles directly. However, we can use the fact that the relative molecular mass is the sum of the atomic masses of all the atoms in the hydrocarbon.
2. Determine the atomic mass of carbon (C) and hydrogen (H) from the periodic table. The atomic mass of carbon is approximately 12 g/mol, and the atomic mass of hydrogen is approximately 1 g/mol.
3. Assuming that the hydrocarbon only consists of carbon and hydrogen atoms, we can form an equation based on the relative molecular mass:
Relative Molecular Mass = (number of carbon atoms * atomic mass of carbon) + (number of hydrogen atoms * atomic mass of hydrogen)
Let's assume there are "x" carbon atoms and "y" hydrogen atoms in the hydrocarbon. The equation becomes:
92 = (x * 12) + (y * 1)
4. We are given that the hydrocarbon contains 8 g of hydrogen. Since the molar mass of hydrogen is 1 g/mol, the number of moles of hydrogen can be calculated as follows:
Moles of Hydrogen = Mass of Hydrogen / Atomic Mass of Hydrogen
Moles of Hydrogen = 8 g / 1 g/mol
= 8 mol
5. Convert the number of moles of hydrogen to the number of moles of the hydrocarbon using the ratio between the two. From the equation in step 3, we know that for every "y" moles of hydrogen, there is one mole of the hydrocarbon:
Moles of Hydrocarbon = Moles of Hydrogen / (y * 1)
= 8 mol / y
Therefore, the number of moles of hydrogen depends on the number of hydrogen atoms (y) in the hydrocarbon, which can be determined by finding the solutions for "y" in the equation:
92 = (x * 12) + (y * 1)
To determine the number of moles of hydrogen in a hydrocarbon, we need to use the given information of the mass of hydrogen in the hydrocarbon and the relative molecular mass.
1. The molar mass of hydrogen is approximately 1 g/mol.
2. We are given that the hydrocarbon contains 8 g of hydrogen.
3. The relative molecular mass of the hydrocarbon is 92.
To find the number of moles of hydrogen, we can use the formula:
Number of moles = Mass / Molar mass
In this case, substituting the values into the formula:
Number of moles of hydrogen = 8 g / 1 g/mol = 8 mol
Therefore, there are 8 moles of hydrogen in the hydrocarbon.